EP 0045788 A1 19820217 - INK JET PRINTER.
Title (en)
INK JET PRINTER.
Title (de)
TINTENSTRAHLSCHREIBER.
Title (fr)
MIPRIMANTE A JET D'ENCRE.
Publication
Application
Priority
US 12210680 A 19800219
Abstract (en)
[origin: WO8102465A1] Ink jet printer (10) having a rotatable ink reservoir (12) for supplying ink to a print head (52) through a capillary ink supply line (48), which print head (52) is movable in rotary direction and is adapted to eject ink droplets on to a record medium (72) as the head (52) is moved past the record medium (72). The ink reservoir (12) has two cavities (28, 30), one of which (30) is connected to the print head (52) by the ink supply line (48). Valve means (36, 40, 42) are provided between the cavities (28, 30) to control the flow of ink therebetween such that ink is free to flow between the cavities (28, 30) when the ink reservoir (12) is at rest, but is prevented from flowing, due to centrifugal force, upon rotation of the ink reservoir (12). By virtue of this arrangement a major proportion of the total ink in the reservoir (12) is isolated from the ink supply line (48) during rotation of the reservoir (12), whereby a sufficient negative head is maintained at said print head (52) for proper operation of the printer (10).
Abstract (fr)
Imprimante a jet d'encre (10) comprenant un reservoir d'encre tournant (12) alimentant en encre une tete d'impression (52) par l'intermediaire d'une ligne d'alimentation capillaire (48), ladite tete d'impression (52) etant mobile en rotation et concue pour projeter des gouttelettes d'encre sur un milieu d'enregistrement (72) lorsque la tete (52) se deplace le long du milieu d'enregistrement (72). Le reservoir d'encre (72) presente deux cavites (28, 30), l'une d'entre elles (30) etant connectee a la tete d'impression (52) par l'intermediaire de l'alimentation (48). Des moyens formant vanne (36, 40, 42) sont prevus entre les cavites (28, 30) pour controler le debit d'encre entre celles-ci de telle sorte que l'encre s'ecoule librement entre les cavites (28, 30) lorsque le reservoir d'encre (12) est au repos, mais ne puisse pas s'ecouler, en raison de la force centrifuge, lorsque le reservoir d'encre (12) tourne. Cette disposition permet d'isoler la majeure partie de l'encre situee dans le reservoir (12) de la ligne d'alimentation (48) pendant la rotation du reservoir (12), de telle sorte qu'une pression negative suffisante se maintienne dans la tete d'impression (52) afin que l'imprimante (10) fonctionne correctement.
IPC 1-7
IPC 8 full level
B41J 2/17 (2006.01); B41J 2/175 (2006.01); B41J 27/00 (2006.01); G01D 15/18 (2006.01)
CPC (source: EP US)
B41J 2/175 (2013.01 - EP US); G01D 15/18 (2013.01 - EP US); Y10T 137/0753 (2015.04 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8102465 A1 19810903; CA 1137356 A 19821214; DE 3176781 D1 19880714; EP 0045788 A1 19820217; EP 0045788 A4 19860605; EP 0045788 B1 19880608; JP S57500098 A 19820121; US 4287523 A 19810901
DOCDB simple family (application)
US 8100193 W 19810211; CA 371004 A 19810216; DE 3176781 T 19810211; EP 81900615 A 19810211; JP 50090881 A 19810211; US 12210680 A 19800219